Sometimes it's simple and it works. That's how it is with these counterweights. Inexpensive (cheap) wide-angle phone lenses very often only give sharpness in the center and all sides and corners look very blurry. A good wide angle lens is much larger and the extra glass keeps the image sharp throughout the frame. But such a lens is heavy and if you're using something like the Osmo Mobile 3 it's not going to be balanced. These counterweights completely solve the problem.
π₯ Panasonic HDC-SD60S Silver HD Camcorder with 35X Intelligent Zoom (SD-Based) - Discontinued
35 Review
GoPro Hero 7 Black Bundle - Extra Battery + Super Suit Dive Housing Case + 64GB SD Card - E-Commerce Packaging - Waterproof Digital Action Camera with Touch Screen, 4K HD Video, 12MP Photos, Live Streaming, and Stabilization
58 Review
Electric stabilizer for smartphone DJI Osmo Mobile 4
31 Review
Quadcopter DJI Mavic Mini, white
37 Review